Three more Democratic senators -- Cory Booker of New Jersey, Mark Warner of Virginia and Heidi Heitkamp of North Dakota -- joined in support Thursday of an internationally backed nuclear deal with Iran.
That brings the tally of Senate backers to 37, just four short of what President Obama needs to prevent Republicans from passing a resolution of disapproval out of Congress.
On Wednesday, Obama secured the 34 votes necessary to prevent the Senate from overriding his promised veto of any disapproval resolution. Now Obama is within reach of having the votes needed to prevent him from using his veto pen in the first place.
The three senators who endorsed the deal...